Out of I and `I^(+)` which has larger size and why ?

Out of Mn and Fe which has higher IE_(3) and why ?

Out of KCI and CaO , which has higher lattice energy and why?

a. Among Cu^(o+) , Cu^(2+) and Cu which is the largest in size and why? b. Which element in periodic table has the highest IE (ionisation energy)? c. Which element, Mg or Al , is more metallic and why?

Out of Ne and Na^(+) which has higher ionisation energy and why ?

Out of O and S which has higher electron affinity and why?

Out of MgO and NaCl , which has higher lattice energy and why?

From the part of a periodic table, answer the following questions (a) Atomic number of oxygen is 8. What would be the atomic number of, Fluorine ? (b) Out of 'X' and 'Q' which element has larger atomic size ? Give reason for your answer. (c) Out of 'Y' and 'Z' which element has smaller atomic size ? Give reason for your answer.